Engine construction



G. D. ANGLE ENGINE CONSTRUCTI ON Nov. 30, 1926. 1,608,759

' Filed August 14. 1924 INVENTOR 6162227.D.A27'/ A TORN Patented Nov.30, 1926.

UNITED STATES Gm D. ANGLE, OF DETBOIT, HIGKIGAN.

PATENT O FFICE.

Naum GONSTBUGTION.

a plication filed Lucus tu, 1924. Serial no. 732,077.

This invention relates to engine constructions generaily and has moreparticular reference' to improvements in the desi and Construction 'ofengine cylinder he s.

In'the past it has been found that the water jackets on the enginecylinders opened at the welded joints frequently, due to the vibrationincident to the ex losions in the engine cylinders. These fai uresappeared more frequently where the cylmder heads were not properlybraced between the ports. The water jacket furnishes no resistance tothe defiec'tion of the cylinder head, nor does it sufiiciently dampenthe vibrations. According to the present invention, the members to whichthe jacket is welded or other- Wise joined a re interconnected so as torelieve the joints of the water jacket of any strain in the operation ofthe engine to avoid failures.

With the foregoing pur oses in View, 'the invention provides a cylin erhead'construction wherein the valve guide bosses are mutually braced,the bosses being welded onto the hae and being in tum welded to oneanother.

lin the drawing illustrating the invention- Fig. 1 is a Vertical sectionthrough an engine cylinder head incorporating the improvementsherein-above referred to.

Fig. '2 is an isolated plan view of one of the valve ide bosses.

The engine cylinder, the up er ortion of which is shown at 10, has theea 11 fitted over the upper end thereof and welded as indicated at 12.The head 11 is preferably a one-piece forging, and hasoppositely1nclined valve seats 13 and opposed ports 14, the latter bein providedwith flanges 15, integral with t e, head or welded thereon. The head ismachined to provide oppositely inclined fiat faces 16 onto which theplates 17, forming an integral part of the valve guide bosses 18, arewelded as indicated at 19. The valves 20 operate in bushings 21, whichare usually -driven into the bosses 18. The bushings 21 are machined onthe same centers with the seats 13 after all of the weldmg o erations onthe head have been complete 'and the head has been annealed to msureagainst any further warpa-ge.

-avoid excessive vlbration that usually resulted in the failure at thejoints of the water jacket. The water jacket 24 is welded at 25 to thevalve guide bosses 18, andat 26 and 27 to the flanges 15 of the parts 14of the head 11. The-lugs 22 are formed with lightening holes asindicated at 28, which also avoids unnecessary obstructions to the' flowof the cooling fiuid in the water 'acket The rib formed' by the weldingtoget er of the lugs 22.' servas, to a certain extent, to transmit heatfrom about the valves to the cooling fluida The ears 29 on the bosses 18serve as supportsfor "the cam shaft housing disposed between'the'*"valves 20 above the jacket 24.

it will be apparent from the foregoing description that I have rovidedan improved engine cylinder hea Construction, in which all' parts of thehead are su port/ed against deflection under load, and t at theconstruction avoids the use of'a heavy jacketior top plate forreinforcin the head. This latter t pe of Construction involved the useof wel ed joints which were usually under considerable strain aftercooling, or

warped oompletely out of alignment, especially if not made of heavy wallsectlon, 01- if not properly braced, in either of which events the wei'ht involved was found to be prohibitive. 'file present Construction, itwill beobserved, requires a minimuin amount of welding so that warpageof the joints in cooling is reduced to a minimum. At the v same time; noexcessive wei htis added in the bracing of the head an the bracing isaccomplished in such a way that a very light jacket can be utilized.,and there is no dan er of failures at the jacket joints. An ad edadvantage of the Construction will be seen in the fact that the bracingstructure is located where it serves to provide additional coolingsurface.

I claim:

1. In an en e cylinder head construction a pair o opposed valve guidebosses wel ed onto the head, said bosseshaving gortions thereofweldedtogether to mutually.

race said bosses a'nd reinforce said head.

2. In an engine eylinder head construci 'tion, a cylinder having a headjoined therebosses andreinforce said head.

to, With a water jacket'surrounding said head, a pairof opposed valveguide bosses welded onto said head, and having said jacket Weldedthereto, lugs eX'tending from said 'bosses into abutting relation withinsaid jackets, welded together to brace said 3. In ani engineconstruction, a forged head oVer-lapping the end of' the eylinder andwelded' thereto, said head having ,op-

.posed valve port s provided with integral flanges,'separate valve guidebosses welded onto saidports, lugs 'x'tending"from said b ossg weldedtogether to provide reinforcing meaps for said head, and a jacket Weldedonto said port flanges.

4. In .an engine Construction, 'a separate head piece joined to the'engine cylinder,

'valvesea'ts and a pair of opposed valve'ports 'provided in said head,said head being -machined to' provide oppositely inclined flat fases-atsaidports, a pair of separate valve guide' bosses having plates Weldedonte said face s, and lugs on said bosses ext'ending into space betweensaid' osses and welded 1130 l gether.. r

. hln a built up engine cylinder head construction, a head havmg opposedports, separate valve guide bosses for said ports, and a-ielaiively thiniaterally extending integral extension on one of said bosses welded tothe other of said bosses. v i

' 6; In a built up engine cylinder head construction, ahead havingopposed ports, separate valve guide bosses, welded to said ports, andlugs on said bosses exiending into approximate abutting relation andwelded together, thereby forming a rib serving as a truss .member andfor cooling the. valves Operating .in said bosses.

7. In an engine cylinder head construc tion, a headmiember joined Withthe cylinder,.va1v Seats and ports provided therein, separate valveguidesjoined with said head at 'said ports', and means connecting saidguides serving to reinforce said head;

In testimony whereof I afiix my si GLENN D. AN LE.

ature.

